package com.edu.hibernate;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;

/**
 * A data access object (DAO) providing persistence and search support for
 * Lecture entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see com.edu.hibernate.Lecture
 * @author MyEclipse Persistence Tools
 */

public class LectureDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(LectureDAO.class);
	// property constants
	public static final String SUBJECT_ID = "subjectId";
	public static final String TITLE = "title";
	public static final String SHORT_CONTENT = "shortContent";
	public static final String CONTENTS = "contents";
	public static final String IMG = "img";
	public static final String CREATE_BY = "createBy";
	public static final String MODIFIRE_BY = "modifireBy";
	public static final String STATUS = "status";

	public void save(Lecture transientInstance) {
		log.debug("saving Lecture instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Lecture persistentInstance) {
		log.debug("deleting Lecture instance");
		try {
			getSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Lecture findById(java.lang.Integer id) {
		log.debug("getting Lecture instance with id: " + id);
		try {
			Lecture instance = (Lecture) getSession().get(
					"com.edu.hibernate.Lecture", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Lecture instance) {
		log.debug("finding Lecture instance by example");
		try {
			List results = getSession().createCriteria(
					"com.edu.hibernate.Lecture").add(Example.create(instance))
					.list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Lecture instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Lecture as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findBySubjectId(Object subjectId) {
		return findByProperty(SUBJECT_ID, subjectId);
	}

	public List findByTitle(Object title) {
		return findByProperty(TITLE, title);
	}

	public List findByShortContent(Object shortContent) {
		return findByProperty(SHORT_CONTENT, shortContent);
	}

	public List findByContents(Object contents) {
		return findByProperty(CONTENTS, contents);
	}

	public List findByImg(Object img) {
		return findByProperty(IMG, img);
	}

	public List findByCreateBy(Object createBy) {
		return findByProperty(CREATE_BY, createBy);
	}

	public List findByModifireBy(Object modifireBy) {
		return findByProperty(MODIFIRE_BY, modifireBy);
	}

	public List findByStatus(Object status) {
		return findByProperty(STATUS, status);
	}

	public List findAll() {
		log.debug("finding all Lecture instances");
		try {
			String queryString = "from Lecture";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Lecture merge(Lecture detachedInstance) {
		log.debug("merging Lecture instance");
		try {
			Lecture result = (Lecture) getSession().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Lecture instance) {
		log.debug("attaching dirty Lecture instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Lecture instance) {
		log.debug("attaching clean Lecture instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
}